Weighing derrick



July 24, 1934. ouv 1,967,622

WEIGHING DERRICK Original Filed Dec. 20, 1932 Patented July 24, 1934 UNITED STATES WEIGHING DERRICK Marius Lewis Louvier, Port Arthur, Tex, assignor of twenty-five per cent six per cent to Joe Landry to Adonis Prince and Original application December 20, 1932, Serial, No. 648,131. Divided and this application June 24, 1933, Serial No. 677,515

5 Claims.

This invention relates to derricks and particularly to means whereby materials supported by the derrick boom may be weighed, this application being a division of my application filed December 20, 1932, Serial No. 648,131.

,One of the objects'of my invention is to provide means supported by the mast of the derrick and upon the extremity of the boom whereby material being carried by the extremity of the boom may be weighed upon a scale supported on the mast or other like part of the derrick and in this connection provide means whereby proper compensation may be made for the weight of the cable, the bucket or other article supporting means carried by the cable, or, in other words, to provide means whereby the net weight of the material supported by thecable may be indicated.

Another object is to provide a scale mounted upon the derrick mast and connections leading from the scale to a lever mounted upon the extremity of the boom and supporting the weight of the article carried by the boom, which scale connection is adjustable for variations in the work to be done and adjustable in order to correct the accuracy, of the scale from timev to time. 1 7

Other objects will appear in the course of the, following description.

My invention is illustrated-in the accompanying drawing, whereinz- Figure 1 is a side elevation of a portionof a derrick shown fully in my application for Patent 648,131 filed December 20, 1932;

Figure 2 is a fragmentary longitudinal section through the sliding connection between the scale beam and the lever mounted upon the extremity of the boom; 7

Figure 3 is a section on the line 3-3 of Figure 2;

Figure 4 is a section on the line 4-4 of Fig 7 ure 2;

Figure 5 is a detailed cross section through the, lever supporting means on the scale frame.

Referring particularly to the drawing, 10 designates the mast of the derrick which may be mounted upon any suitable base, this mast carrying a winding drum 11 rotatable with-relation to the mast. This drum is heldirom re-, verse movement by the pawl 12. I have not illustrated any means whereby this drum may be rotated as this forms no part of my inven-" tion but is fully shown in my before mentioned upwardly projecting lug pending application. The upper end of the mast is supportedby means of a bracedesignated are pivoted or otherwise connected to the irons 15. So far I have described one particular form of derrick but it will be understood that I do not Wish to be limited to this particular form.

Pivotally mounted between the irons 15 is a lever 18. This lever has a downwardly extending portion'19 as shown in Figure 1 disposed between the irons 15 and pivoted thereto at 20. This lever 18 at its rear end has a rearwardly and upwardly projectingportion 21, extending outward and away'from the pivot as at '22,. this portion 22 carrying a removable weight 23. To the under face of the lever 18 forward of the pivot 20 thereis attached a hook 24 supporting a block 25 over which a cable 26 extending from the drum 11 passes, this cable extending through a lower block 2'7 adapted to support a bucket, bale or any other article, which may be handled by the derrick. The cable 26 passes to a drum 27 over a pulley 28 carried by abracket 29. a i

Mounted upon'the mast 10 or supported in any other suitable manner is a scale frame 30 havingan upwardly extending support 31 upon 7 which the scale beam designated generally 32 is pivoted at 33. The scale beam 32 has three scale arms 34, 35 and 36 upon which weights 37 are slidably disposed, the extremity of the arms 34 and 35 being connected and supporting a pea 37. The rear end of the scale beam is formed with the outwardly projecting arm 38 upon which a counterweight 39 is mounted. So far I have described an ordinary scale beam.

Pivotally mountedupon the upper face of the frame 30 is a lever 40. This is disposed at its lower end between two upwardly extending ribs 41 and there are a plurality of pivot holes through these ribs through one, of which the pivot pin 42 for the lever may be disposed.- V The lever 40 islongitudinally slotted at 43 and slidingly mounted upon the lateral walls of this 7 slot is a slide 44 shown in Figure 2. This slide at its rear end has an'upwardly extending lug '45 and extending through this lug and having 46 has threaded engagementso that as the 7 screwis turned in one direction, or theothen:

2;: a the slide will be pulled upward or forced downward. Below the lug 45, the slide 44 as shown in Figure 3 is provided with a vertical slot 48, the slot extending transversely of the slide and passing downward through this slot is a link 49, the lower end of .which is pivoted at 50 to. the; scale beam 32, the upper end of the link passing through a fulcrum member 51, V-shaped 'in cross section as shown in Figure 2, which has as rocking bearing upon the lateral walls of the slot 48 as shownin Figures 2 and 3. The.-upper-send of the link 49 is screw-threaded and car.- ries adjusting nuts 52. Thusit'willlbe seerithat as the lever 40 is drawn upward at its rear end,,..

it will pull upward on the link 49 and pull upward on the scale beam 32. The lever-404s pivotally connected to a yoke'formed of-two sec-r tions 53 and 54 as shown in Figure 4, these sections being pivoted to an eye formedronthe: lower end of the cable 55. The lower end of the sections :53 .are formed with inwardly-pro jecting studs 56.1which1: engage in' apertures formed in :the side .bars or: walls: of; the. [lever 40., A.bolt;57 extends. acrosstwo sections. of the.

yoke. provided with nutseat. its oppositeends so.

that, .the :two sections; of the yoke -.may .be held. in: conjoinedrelationzto. the..-lever. 40..

The upper. end-.of the..cable 55.18. connected. to a bolt58. whichin ,turnpasses loosely through a slot59, theitbolt EttifitSillDIlBfBl'ld carrying the V-shaped-fulcrum member 604 against which a nut 61 engaging .the bolt bears. a

W ith this co nstruction, -.it; will ".be obvious that there will;be afixedweight uponthe outer .end

oi the, lever 18. comprising the. weight of the countereweight 23; the .blocks25i-and27 and the weight. of thescables Thegweight. 23' is designed. to counter;-'weight;the. weight of .thexarm21. and .1 this weight-23, of course,';may= .be varied .1301 suitany circumstances of ,operation. and: keep the cable- 55 taut. It willbe obvious thatyas. the slide. 44 is adjusted .t0ward;the pivotal end. of" the lever ,40, it:will;depress the. scale beam but this may becompensated for by. adjusting -.the. adjustablea support: :31... As the slide-44: is ad.- justed-rnearerto. 101*; further. from: the .fulcrum, the leverage of the lever 40 will be- -increased.or decreased and. by changing the. fulcrum point of connection i between the. scale beam and the leverl0',"ithe1 scale --may .--be; adjusted;to..weigh correctly. 1 This;- adj ustment: may *be secured coarsely.- by shifting thepivotal connection Ice-- tween the lever40cand therib; 41 and more del.-' icately'by' adjusting theslide 44 .byimeans of the-adjusting: screw 46'.

It, willbe obvious thatwhen-weightnis carried upon the block 27; this weight -.will act to depressthe forward end of the lever 18 raising the tail end 21, pulling.upwardonv the cable i and, upward on;the lever-140,v thus. pulling upward on'the scale beam 32,.againstthe-action 'ofthe. several weights. 1 Thus. thelobje'ct', material or article supported :by-the. cable :261through.v block 2'? maybe-accurately; weighed upon the scale beam.

Withthisder-rick-a load maybe weighed and the net load indicated-and thus, does-not'make it, necessary to weigh the -load carrier, whatever thatmay be; separate from the load car-i ried thereby. saving-time andbookkeeping and making, therecording-of 'fthe net weight -very easilysaccomplished.

Thescale. beam .32 will preferably have; three separate. weighing beams; oneof them for weigh-1L ingsweights from-.Jentotwo, thousand.=;pounds;...

another for weights from two thousand to ten thousand pounds, and one from a quarter of a pound to tenvpounds. The scale is preferably made of metal and may be protected by the frame 30 or entirely housed by said frame. The scale, it will be. seen hasho platform. on which :dirt or other objects may accumulate and thus throw it out of balance.

1. In a derrick, a boom, a weighing scale mounted-"on the derrick, a lever pivotally supportedcn the.boom,.an object support carried by theuleverpnone side of its fulcrum, a lever pivotally.--supported :above the pivotal point of the scale beam, a connection between the last named "fleverx 'andtthehfirst named lever on the other side of-.it's';.-fulcrum, a link extending from the scale beam of the weighing scale and pivotallyconnected to the scale beam in front of the pivot of the scale beam, said link engaging said second named lever; and meansforadjusting the point ofengagement of the-link- "with said lever" nearer-- to or'further from the fulcrum of *the said last namedlever.

2. In a derrick,- amastf' a boom; ascale mounted upon-thederrick and including" a upon saidlever; J a link-carried by the slidable member and pivotally engaging-thescale' beam"- forward of thepivot thereof, a lever---pivotedupon the outer end of-the boom; one endof said lastnamed lever having a-connection-to the' first named lever; andmeans for" supporting weight from the secondnamedlever said-meansbeing located on the other-side of the fulcrum- A of the second named lever from said connection:

3 In a derrick, a mast, a boom-extending outwardfrom the mast, a scale mounted upon the mast includinga-frame-=and=a pivoted---scalebeam, a =lever-mounted-uponthe boomand" pivoted intermediate its ends; a-weight detach:

ably mounted upon-theouter 'end-of-thedever,

a material supporting means-connectedto the a lever outward-of its pivotal point; a second lever pivoted upon the frame of the scale beamrthe' lever extending--upward and-inward, 'a--slide slide to the-scale beam*'outward "of-its pivotal from the fulcrum of the'lever anda connection mounted upon said lever, a linle connecting-the between said second-namedlever-andthe' inner end of the first named-lever:-

4. In a derrickya inastya boom, a lever pivoted intermediate its ends upon theboom; article supportingmeans carried by "said-lever on oneside of its fulcrum, a weighing scale 'mounted upon the derrick and having a pivoted scale beam, a lever pivoted immediately above-the scale-beam; a connection between the in'nerend of the first named lever and the outer free end of'the second namedlever on'theother side of its fulcrum from" the article supporting means,- a slide mounted upon the second "namedlever for longitudinalmovement therealong;-;- means for'adjusting said slide,-the slidehaving a verti cal-1y extending slot, a link'pivotally' connected to;

the -scale beam and extending upward through said slot; a 'Vshaped--bearing member through which the link passesand nutsengaging' the upper: end ;of the linkwith l the upper face of thefulcrum members 5.-,In1.a derrick, 1a .boon'na lever pivoted upon theiree end oflthe' boom, and.article supporting lma lever, a slide mounted upon the second named lever, means for adjusting the slide along the lever, a link pivotally connected to the scale beam forward of its pivotal support and extending upward through the slide, the slide having a slot to accomodate said link and a Vshaped bearing member carried by the link and resting upon the walls of the slot. v

MARIUS LEWIS LOUVIER. 

